Shutter Island
"Which would be worse—to live as a monster or to die as a good man?"
This movie is truly amazing. It's one of these movies where they mess with your head and glue you to your seat trying to figure out the plot twist. Although if you really concentrate in the movie, a lot of hints/easter eggs could be found making the plot twist more predictable and less shocking. Even though i figured out the twist ahead of time, It's still one of the best plot twists i've seen so far.